NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a null-pointer dereference exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the root inode (inode 2) is set to IFLNK (symlink) instead of IFDIR (directory). The parser unconditionally treats the root inode as a directory without checking its type, and when the symlink has an embedded target (small di_size), the directory data buffer is zero-length, causing a null-pointer dereference on the first read. This vulnerability is fixed in 6.0.1698.0.
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Affected Vendors & Products
References
History
Mon, 18 May 2026 14:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:m2team:nanazip:*:*:*:*:*:*:*:* |
Wed, 13 May 2026 16:15:00 +0000
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| Metrics |
ssvc
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Tue, 12 May 2026 22:30:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
M2team
M2team nanazip |
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| Vendors & Products |
M2team
M2team nanazip |
Tue, 12 May 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | NanaZip is an open source file archive. From 5.0.1252.0 to before 6.0.1698.0, a null-pointer dereference exists in the UFS/UFS2 filesystem image parser in NanaZip. The vulnerability is triggered when opening a crafted UFS image where the root inode (inode 2) is set to IFLNK (symlink) instead of IFDIR (directory). The parser unconditionally treats the root inode as a directory without checking its type, and when the symlink has an embedded target (small di_size), the directory data buffer is zero-length, causing a null-pointer dereference on the first read. This vulnerability is fixed in 6.0.1698.0. | |
| Title | NanaZip: Null-pointer dereference in NanaZip UFS parser when root inode is a symlink | |
| Weaknesses | CWE-476 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-05-12T19:21:04.924Z
Updated: 2026-05-13T14:43:33.505Z
Reserved: 2026-04-27T13:55:58.692Z
Link: CVE-2026-42442
Updated: 2026-05-13T14:43:22.836Z
Status : Analyzed
Published: 2026-05-12T20:16:41.393
Modified: 2026-05-18T13:51:59.763
Link: CVE-2026-42442
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